Hypodermic syringe



I Jan. 28, 1930.

G. N. HEIN HYPODERMIC SYRINGE 4 Filed Oct. 2, 1926 EEE; :ESCE:

1N VEN :rok

/f By y ATTORNEY Patented Jan. 28, 1.930l

GEORGE N. HEIN, or SANV lFItA1\'Ic`:Isroo,- 'fmriiicinivIn rivronnnivire jsynlnen y Application fiiea october 2, 192e. semina; 139,060.

This invention relates to the filtering or removal of foreign bodies from fiuids, particularly those fluids used by the medical profes-y l sion for injection by hypodermic syringes.

Such fluids are almost universally contained in ampules, one or both ends of which are broken or fractured to permit of the fluid contents to be removed therefrom and transferred into a syringe for injection. The ampule end breaking or fracturing, often releases minute particles of glass, theiinaterial from which the ampule is formed, and this, at times, finds its way into rthe fluid within thev syringe, and when injected into the patient, Vsets up irritation which may have serious results. Y

It is the removal of this foreign material that the present invention hasfor its prindicate a! conventional formof thin' glass amcipal object; either its removal or separation from the fluid prior. to the fluid entering the syringe or prior to its passing through the syringe discharge orifice. Y

The invention contemplates the utilization of fine mesh filtering material, so positioned as to necessitate the passage through the same of the fluid in its transference from the am-y pule to the patient. The invention also contemplates an ampule end fracturing device in connection with a fluid straining or filtering mechanism, whereby the`V -fracturing of the ampule end or lends will be facilitated.

With these and other objects in view, the invention consists in the assembly and arrangement ofparts and elem-ents hereinafter described and illustrated in the accompanying f drawings; variations in the invention and its respective embodiment may be made within the scope of the claims hereto appended.

To more fully comprehend the invention, reference is directed to the accompanying drawings, forming a part of this specification, wherein- Fig. 1 is a view in side elevation of an ampule with one embodiment of my invention associated therewith, there being disclosed a compression bulb* and a coupling held to ampule by spring means. L v

Fig. 2 A"1s-'a' longitudinal sectional view f through the embodiment, illustrated in Fig. 1.

F ig. y3 islafslightly modified form of cou-` pling member, illustrating particularly fthe :tip 'severing-member for thearnpule. i

the

Fig. 4 is a-view in plan of theattaching ring 'carried bythe couplingy 1 Fig -is a similar view of the ring'carried bythe 'compression bulb.

6 is a view inplanof the preferred jlform of tipfracturing device. f v A Figfis asimilar view of amodified form Aoftip fracturingdevice: v

In the drawings, wherein like characters of reference designate corresponding parts, referring to Figs. 1, 2 and 3, ithe numerals 1 inpule, pointed atits ends at 2 and containing abody of fluid. Over one end 3 of the ampule is adapted for positioning a yieldable bulb structure, having a flange 4, bearing on which is a ring 5 having ears 6.V On the other'end of the ampule is adapted for positioning a tubular'coupling member 7. Iny the construction held between the body and tip members. The n coupling carries at its opposite end a collar 10 which retains within the body a flexible j tubular sealing element 11 for engagement with the ampule .end wall, as illustrated inv Figs. 2 and 3. An ampule end fracturing disk or plate 12 is held within the body 8 and j into theopening therein projects one end 2 of v'the' ampule-Fig. r3, which is fractured on a -slight lateral movement beingimparted to Vthe ampule body While the end is projected VKin the disk opening 13.

Various forms of disks may be employed as indicated in Figs. 6 and. 7,.each Apreferably formed with an opening having a serrated edge 14.

Within a circumferential groove in the surface ofl the collar 10 is received an eared ring 15 to which is attached the ends of coiled springs 16, also connected with the ears 6 of ring 5, they drawing the bulb structure 3 and the coupling member 7 toward each other with one end of the ampule received in each.

In this embodiment of the invention a hypoderinic needle, not shown, may be secured to the end of the tip k9 and the fluid contents of the .ampule may, by the compression of the bulb structure 3, after both ends of the ampule have been broken, be injected directly from the ampule into the patient.

Fig. 3 illustrates a structure in which the bod 8 is eliminated, and collar 17 is threaded c irectly into the base of a tip 18, a filtering screen or element 1() and an ampule end fracturing disk or plate 12 being positioned in the tip chamber between the inner end of Vthe collar 17 and the inner wall of the tip 18.

In all embodiments of the present inveni tion it will be apparent that a filtering element is employed, and through which the fluid from the ampule passes at some period prior to being discharged from the syringe arrel into the patient, and while this filtering element is preferably in the form of an extremely fine mesh metallic cloth, and is i1- lustrated as of mesh material, it is tobe understood that the same may be of such construction as to afford a means for efficiently filtering the fluid as the same passes therethrough.

1. In a syringe structure including a fluid containing ampule forming a syringe barrel, at-ubular tip for receiving one end of the ampule and through which the fluid passes from the ampule, means within the tip for racturing the end of the ampule, and means removably positioned Within the tip for receiving the fractured portion of the ampule and through which the ampule fluid passes prior to discharging from the tip.

2. In a syringe structure including a fluid containing ampule forming a syringe barrel, a tubular tip for receiving one end of the ampule, a compressible bulb for receiving the other end of' the ampule, straining means through which the ampule fluid passes prior to discharging from the tip, means Within the tip for fracturing the end of the ampule, and means connecting the tip and bulb for removably retaining the saine on opposite ends of' theampule.

3. In a syringe structure including a fluid containing barrel forming member, a tubular tip associated therewith for supporting a hypoderinic needle and consisting of threadably connected tubular members, a screen device within the tip, its base flange clamped between said members. 

